"Statistical Abstract of the United States," pp. 211 and 223 "Yearbook of *Rech*," p. 681 1900
75,752,691 dollars: 63,620,529 = $1.19
2 r. 38 k.: 8 = 29 (30) kopecks per pud
517 million puds "Yearbook of *Rech*," p. 681
5170 : 636 = 8.1 puds per barrel
{Apparently there is more than 8 puds of oil per barrel} 1907
1407 : 166 = 8.5 puds per barrel
1908 1512.0 million puds: 178.5 = 8.5 puds per barrel
1909
1455 million puds: 183 = (8)7.9 puds per barrel
1910
127,896,328 dollars : 209,556,048 barrels = = $0.61 (crude oil) 61 cents per barrel 1 (= 42 gallons) 1 gallon = 61/42 = 1.4 cents
715
SEPARATE NOTES 1912-1916

1714 million puds "Yearbook of *Rech*," p. 681
1714:209 = 8.1 puds per barrel
61 cents per barrel (approx. 1 r. 22 k.)
122 : 8 = 15 kopecks per pud